Resin Knockdown House

ABSTRACT

A foamed resin knockdown house in which recesses are provided in opposite end surfaces of adjacent resin segment pieces, reinforcing members are accommodated in closed spaces defined by the opposite pairs of recesses to join together the adjacent segment pieces. Thus, the house is assembled, forming a living space inside. The foamed resin knockdown houses may have inside spaces of various forms depending on the purpose for which they are used.

TECHNICAL FIELD

The present invention relates to a resin knockdown house adapted to be assembled from a plurality of resin segment pieces to form a living space inside thereof.

BACKGROUND ART

Heretofore, there has been known a bungalow made of wood as a conventional outdoor type accommodation. However, a bungalow made of wood not only incurs high construction cost but also takes several days for construction. Although there is available a tent type accommodation, it has poor durability and lacks expensive looking and the site for installing it is limited.

Under the circumstances, the inventor of the present invention has proposed a knockdown dome adapted to be assembled from a plurality of dome segments made of foamed polystyrene as a construction material to form a semispherical space therein (see Patent Document 1). This realizes outdoor accommodations, housing, and so on that can be constructed in a short period of time and at low cost.

Patent Document 1: Pamphlet of International Publication No. WO01/44593.

DISCLOSURE OF THE INVENTION Problem to be Solved by the Invention

Since the knockdown house described in Patent Document 1 above is in the form of a dome, it has sufficient strength in itself. However, taking into consideration of much deposited snow or the like, it is desirable to make it stronger. Further, since the knockdown house described in Patent Document 1 above is assembled from foamed polystyrene alone, there has been room for improvement to make the assembly easier.

SUMMARY OF THE INVENTION

The resin knockdown house according to the present invention includes: a plurality of segment pieces made of a resin provided with a recess on each end face; a pair of opposing recesses in any two adjacent segment pieces out of the plurality of segment pieces defining a closed space; and a plurality of reinforcing members each adapted to be accommodated in the closed space to join the adjacent segment pieces to each other. The resin knockdown house is adapted to be assembled to define a living space inside thereof.

It is preferred that the segment pieces are each in the form of a tetragon and each side of the tetragon is provided with the recess to accommodate the reinforcing member.

The reinforcing member includes a plurality of main reinforcing members extending in a plumb-bob vertical cross-section; and a plurality of subsidiary reinforcing members extending in a direction substantially perpendicular to the main reinforcing members. The plurality of main reinforcing members are connected with each other through the subsidiary reinforcing members. This construction is effective in increasing the strength.

In this case, when the main reinforcing members include each an H-profiled steel bar and the subsidiary reinforcing members include each a hollow members the house can be constructed at low cost. When the subsidiary reinforcing members have each a substantially Z-shaped cross-section, invasion of rain water can be prevented.

Joint members each having an H-shaped cross-section may be provided at intervals on upper and lower joint surfaces of the segment pieces to join the upper and lower segment pieces.

The segment pieces may be configured to define the inner space in the house to have a substantially rectangular parallelepiped form or a substantially semispherical form.

A plurality of the resin knockdown houses may be joined such that the resulting house has therein living spaces communicating with each other.

The segment pieces may be made of foamed polystyrene as a construction material.

ADVANTAGES OF THE INVENTION

According to the present invention, since opposing end faces of two adjacent segment pieces made of a resin are each provided with a recess so as to define a closed space. A reinforcing member is accommodated in the closed space defined by these recesses and then the segment pieces are bonded. This construction allows the segment pieces to cover the reinforcing member all around its periphery. With this construction, the reinforcing member is thermally insulated to prevent cracks on the surface of the house and also prevent rust and corrosion on the reinforcing member. Further, as compared with the case in which the house with foamed polystyrene alone, the performance of assembly is improved.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an overall perspective view showing a resin knockdown house according to the first embodiment of the present invention;

FIG. 2 is an exploded perspective view of FIG. 1;

FIG. 3 is a cross-sectional view along the III-III line in FIG. 1;

FIG. 4 is an enlarged view of part IV of FIG. 3;

FIG. 5 is a perspective view showing a joint pipe used in the resin knockdown house according to the first embodiment;

FIG. 6 is a perspective view showing a corner pipe used in the resin knockdown house according to the first embodiment;

FIG. 7 is a cross-sectional view along the VII-VII line in FIG. 1;

FIG. 8 is a view illustrating the state in which an H-profiled steel bar and a joint pipe are connected to each other;

FIG. 9 is a view illustrating the state in which an H-profiled steel bar and a corner pipe are connected to each other;

FIG. 10( a) is a plan view showing a modification of the side wall and FIG. 10( b) is an elevation showing a corner pipe provided in the side wall in a joined state;

FIG. 11 is an overall perspective view showing a resin knockdown house according to the second embodiment of the present invention;

FIG. 12 is an exploded perspective view of FIG. 11;

FIG. 13 is a diagram illustrating the procedure of assembling the resin knockdown house according to the second embodiment of the present invention (part one);

FIG. 14( a) to (f) is a diagram illustrating the procedure of assembling the resin knockdown house according to the second embodiment of the present invention (part two);

FIG. 15 is a diagram illustrating the procedure of assembling the resin knockdown house according to the second embodiment of the present invention (part three);

FIG. 16 (a) is a plan view illustrating an example of the dome-like house shown in FIG. 11 in which the inside of the dome is constructed in two stories, and FIG. 16( b) is its elevational view;

FIG. 17( a) is a plan view illustrating an example in which the rectangular parallelepiped house in FIG. 1 and the dome-like house in FIG. 11 are joined, and FIG. 17( b) is its elevational view;

FIG. 18 is a diagram illustrating details of the joint section in FIG. 17;

FIG. 19 is a diagram showing a modification in which the resin knockdown house of the present invention is applied to a hog-backed house;

FIG. 20 is a diagram showing the shape of the joint section of the segment pieces that constitute the house shown in FIG. 19;

FIG. 21 is a diagram showing a modification in which the resin knockdown house of the present invention is applied to a substantially cylindrical house;

FIG. 22 is a diagram showing a modification of the dome-like house;

FIG. 23 is a longitudinal cross-sectional view of FIG. 22;

FIG. 24 is an enlarged perspective view showing a joint member; and

FIG. 25 is a diagram illustrating the state of attachment of the joint member.

EXPLANATION OF REFERENCE NUMERALS

11 segment piece 11a, 11b, 11c recesses 21 segment piece 21a, 21b recesses 40, 41, 46 H-profiled steel bar 42, 47 joint pipes 43 corner pipe 51 segment piece 51a, 51b recesses 100 rectangular parallelepiped house 200 dome-like house

BEST MODE FOR CARRYING OUT THE INVENTION First Embodiment

Hereinafter, the resin knockdown house according to the first embodiment of the present invention is explained with reference to FIGS. 1 to 10.

FIG. 1 is an overall perspective view showing a resin knockdown house 100 according to the first embodiment of the present invention and FIG. 2 is an exploded perspective view of FIG. 1. In the first embodiment, a plurality of segment pieces are assembled to form side walls 10 and a roof 20, thus forming a rectangular parallelepiped house 100 having inside thereof a living space in a parallelepiped form. Note that front, rear, left and right directions of the house are defined as shown in FIGS. 1 and 2 and hereinafter, the construction of each section is explained according to these definitions.

The side wall 10 includes a plurality of segment pieces 11A and 11B (which may in some cases be generically represented by reference numeral 11 in the following description) segmented in the direction of height and in the direction to front and rear, respectively, into a substantially rectangular form, a window section 12, and a door section 13. Front and rear end surfaces and upper and lower end faces of the segment piece 11 are connected with opposing front and rear end faces and upper and lower end faces of an adjacent segment piece 11 and with frames of the window section 12 and of the door section 13, respectively.

The roof 20 includes a plurality of segment pieces 21A, 21B, and 21C (which may in some cases be generically represented by reference numeral 21 in the following description) segmented in the direction to front and rear and in the direction to right and left, respectively, into a substantially rectangular form rounded in the direction to right and left. Front and rear end faces and right and left end faces of the segment piece 21 are connected with opposing front and rear end faces and right and left end faces of an adjacent segment piece 21. Then, the roof 20 is connected with an upper part of the side wall 10 to form the house. Note that the roof 20 extends outward to right and left over the side wall 10 to form eaves (see FIG. 7).

To the front of the house is attached a side wall 30 that includes a frame made of iron, aluminum, wood or the like and a window glass-fitted entrance section 31 therein. The front face of the house is blocked by the side wall 30. To the upper part and the right and left sides of the side wall 30 are attached eaves 35 assembled from a plurality of segment pieces 36, so that the three sides of the entrance section 31 are surrounded by the eaves 35. The shape of the entrance section 31 is not limited to one shown in the figure but may be window-like or in the form of a counter in a shop. Note that the sizes of the segment pieces 11, 21, and 36 are determined taking into consideration their transportability and assemblability. The number of the segment pieces 11, 21, and 36 differs depending on the size of the house to be constructed. Therefore, the numbers of segmentation of the side wall 10 and of the roof 20 are not limited to those illustrated in the figure.

The segment pieces 11, 21, and 36 are made of foamed polystyrene having a blowing ratio of 1 to 90 folds and a thickness on the order of 10 to 30 cm. For example, for land areas where they have at most about 80 cm of deposited snow, segment pieces made of foamed polystyrene having a blowing ratio of 20 folds and a thickness of 20 cm may be used. Note that in order to obtain the same strength, a segment piece of foamed polystyrene having a greater blowing ratio must have a greater thickness. On the other hand, in land areas where it is unnecessary to take into consideration accumulation of snow, the foamed polystyrene may have a blowing ratio of more than 20 folds or a reduced thickness as small as 20 cm or less. On the contrary, in land areas in which they have deposited snow in a depth of 1 m or more, the foamed polystyrene must have a blowing ratio of 20 folds or less or an increased thickness to secure its strength.

Although the rectangular parallelepiped house 100 is self-sustainable by joining of the plurality of segment pieces 11 and 21 with each other alone, in the present embodiment, steel beams or the like as reinforcing members are incorporated in each joint section of the segment pieces 11 and 21 in order to increase the strength of the house. Hereinafter, explanation is made on this point.

As shown in FIG. 2, in front of and at the back of the segment piece 11, there are set up H-profiled steel bars 40 from the bottom to the upper end of the side wall 10. Also, in front of and at the back of the segment piece 21, there are installed H-profiled steel bars 41 from the right end to the left end of the roof 20. That is, the H-profiled steel bars 40 and 41 are provided as extending in a plumb-bob vertical cross-sectional plane of the house. At the same time, the H-profiled steel bars 40 and 41 are provided at predetermined intervals in the direction along the length of the house. To the H-profiled steel bars 40 and 41 are attached a plurality of joint pipes 42 and a plurality of corner pipes 43 substantially perpendicularly to the direction to front and rear, with the H-profiled steel bars being joined with each other through the pipes 42 and 43. The H-profiled steel bars 40 and 41 have higher strengths than those of the pipes 42 and 43 and function as main reinforcing members for the house. The pipes 42 and 43 function as subsidiary reinforcing members for the house. The upper ends of the H-profiled steel bars 40 and the right and left ends of the H-profiled steel bars 41 are connected with each other through the corner pipes 43 as described hereinbelow.

FIG. 3 is a cross-sectional view along the III-III line in FIG. 1, illustrating the shape of the joint section of the segment pieces 11 and 11 that are adjacent to each other in the direction to front and rear. FIG. 4 is a cross-sectional view along the IV-IV line in FIG. 1, illustrating the shape of the joint section of the segment pieces 21 and 21 that are adjacent to each other in the direction to front and rear. On the front and rear end faces of each of the segment pieces 11 and 11, there are formed with recesses 11 a, respectively, which correspond to the shape of the H-profiled steel bar 40 in the stage of their molding. On the front and rear end faces of each of the segment pieces 21 and 21, there are formed with recesses 21 a, respectively, which correspond to the shape of the H-profiled steel bar 41 in the stage of their molding.

A front half and a rear half of the H-profiled steel bar 40 are accommodated in the recesses 11 a and 11 a of each of the segment pieces 11 and 11, respectively, and contact surfaces of the opposing segment pieces 11 and 11 are bonded to each other with an adhesive. On the other hand, a front half and a rear half of the H-profiled steel bar 41 are accommodated in the recesses 21 a and 21 a of each of the segment pieces 21 and 21, respectively, and contact surfaces of the opposing segment pieces 21 and 21 are bonded to each other with an adhesive. With this construction, the H-profiled steel bars 40 and 41 are accommodated in respective closed spaces defined by the recesses 11 a on the contact surface of the segment pieces 11 and by the recesses 21 a on the contact surface of the segment pieces 21, respectively, and peripheries of the H-profiled steel bars 40 and 41 are completely covered by the segment pieces 11 and segment pieces 21, respectively. Note that portions that are open to the atmosphere may be present as far as rust, corrosion and dew formation of metallic members are inhibited and durability and interior comfort of the house are not damaged. That is, the H-profiled steel bars 40 and 41 may be covered in a substantial manner. However, it is preferred that the H-profiled steel bars 40 and 41 are completely covered as shown in FIGS. 3 and 4.

On the other hand, as shown in FIG. 2, above and below the segment pieces 11 and laterally to right and left with respect to the segment pieces 21, there are provided joint pipes 42 in the direction to front and rear, and the corner pipes 43 are provided between the side wall 10 and the roof 20. Further, on each of the lower ends of the side wall 11, there extends an angle bar 44 having an L-shaped cross-section in the direction to front and rear. The angle bar 44 is to restrict the position of the house on the foundation. The H-profiled steel bars 40 are bolted to the angle bar 44.

The joint pipe 42 includes a pipe 42 a and the joint pipe 42 a has a flange section 42 b on both ends thereof as shown in FIG. 5. The corner pipe 43 includes a pair of pipes 43 a and a joint bar 43 c that integrally joins the pipes 43 a as shown in FIG. 6. The pipe 43 a has a flange section 43 b on both ends thereof. The flange sections 42 band 43 b are formed, for example, by press forming ends of the pipes 42 a and 43 a by using a vice or the like. On the flange sections 42 b and 43 b, which are ends on one side of the pipes 42 a and 43 a, there are provided with holes 42 c and 43 c for inserting a bolt therein, respectively. On the flange sections 42 b and 43 b, which are ends on the other side of the pipes 42 a and 43 a, there are provided with holes 42 d and 43 d for inserting a bolt therein, respectively. Note that in FIGS. 5 and 6, only one of the holes 42 c and 43 c or of threaded holes 42 d and 43 d is shown.

FIG. 7 is a cross-sectional view along the VII-VII line in FIG. 1, illustrating the shape of a connection section of a pair of segment pieces 11A and 11B adjacent to each other in the direction to top and bottom, the shape of a connection section of a pair of segment pieces 21A and 21B adjacent to each other in the direction to right and left, and the shape of a joint section of the roof 20 (21A) with the side wall 10 (11B). Note that the shape of the connection section of the segment pieces 21B and 21C and the shape of an engaging section of the segment pieces 21C and 11B are similar to those shown in FIG. 7, and hence illustrations thereof are omitted.

As shown in FIG. 7, on the upper and lower joint end faces of the segment pieces 11A and 11B, there are provided with recesses 11 b, respectively, which correspond to the shape of the pipe 42 in the stage of their molding. An upper half and a lower half of the joint pipe 42 are accommodated in the recesses 11 b in each of the segment pieces 11A and 11B, respectively, and contact surfaces of the opposing segment pieces 11A and 11B are bonded to each other with an adhesive. With this construction, the joint pipe 42 is accommodated in a closed space defined in the contact surfaces of the segment pieces 11A and 11B by the recess 11 b, the periphery of the joint pipe 42 is completely covered by the pair of the segment pieces 11A and 11B. On the lower end surface of the segment 11A is provided with a recess 11 d corresponding to the shape of the angle bar 44 and the angle bar 44 is accommodated in the recess 11 d. The angle bar 44 is fixed to a foundation 300.

The upper end face of the segment piece 11B and the lower end face of the segment piece 21A are each provided with recesses 11 c and 21 b, respectively, corresponding to the shape of the corner pipe 43 in the stage of their molding. The upper and lower pipes 43 a and 43 a of the corner pipe 43 are accommodated in the recesses 11 c and 21 b, respectively, and contact surfaces of the segment pieces 11B and 21A are bonded with an adhesive. As a result, the corner pipe 43 is accommodated in a closed space defined in the contact surface of the segment pieces 11A and 21A by the recesses 11 c and 21 b, the periphery of the corner pipe 43 is completely covered by the segment pieces 11A and 21A.

The right and left end faces of the segment pieces 21A and 21B are each provided with recesses 21 c, respectively, corresponding to the shape of the joint pipe 42 in the stage of their molding. A left half and a right half of the joint pipe 42 of are accommodated in the recesses 21 c of the segment pieces 21A and 21B, respectively, and contact surfaces of the opposing segment pieces 21A and 21B are bonded with an adhesive. With this construction, the joint pipe 42 is accommodated in a closed space defined in the contact surfaces of the segment pieces 21A and 21B by the recesses 21 c, the periphery of the joint pipe 42 is completely covered by the segment pieces 21A and 21B.

The flange section 42 b of the joint pipe 42 is perpendicularly connected with the H-profiled steel bar 40 as shown in FIG. 8, and flange sections 43 b of the corner pipe 43 are perpendicularly connected with the H-profiled steel bars 40 and 41, respectively, as shown in FIG. 9. Note that the shape of the connection section of the joint pipe 42 and the H-profiled steel bar 41 is similar to that shown in FIG. 8 and illustration, and hence illustration thereof is omitted.

As shown in FIG. 8, the flange sections 42 b of the pair of joint pipes 42 abut inner face sections 40 a of the H-profiled steel bar 40 facing in the direction to front and rear (see FIG. 3). The face section 40 a is provided with a hole 40 b. A bolt 45 inserted through the hole 42 c of the joint pipe 42 and the hole 40 b of the H-profiled steel bar 40 is threadably fitted in the threaded hole 42 d of the pipe 42 to integrally fasten the pair of joint pipes 42 with the H-profiled steel bar 40.

As shown in FIG. 9, flange sections 43 b of a pair of the corner pipes 43 abut the face section 40 a of the H-profiled steel bar 40 and a face section 41 a of the H-profiled steel bar 41 (see FIG. 4). The bolt 45 inserted through the hole 43 c of the corner pipe 43 and the hole 40 b of the H-profiled steel bar 40 and the bolt 45 inserted through the hole 43 c of the corner pipe 43 and the hole 41 b of the H-profiled steel bar 41 are threadably fitted in the threaded holes 43 d, respectively, to integrally fasten the pair of joint pipes 42 with the H-profiled steel bars 40 and 41, respectively.

Note that since the pipes 42 and 43 are not attached to the front sides of the H-profiled steel bars 40 and 41 that are installed in the front of the house, the H-profiled steel bars 40 and 41 in the front are provided with threaded holes instead of holes 40 b and 41 b, respectively, and the pipes 42 and 43 are fastened to the rear sides of the H-profiled steel bars 40 and 41, respectively, through these threaded holes.

Next, explanation is made on the procedure of assembling the resin knockdown house according to the first embodiment. First, on a foundation (not shown) of a house are set up the H-profiled steel bars 40 for the front through the angle bars 44. As mentioned above, the H-profiled steel bars 40 are each provided with a threaded hole, through which flange section 43 b on one side of the corner pipe 43 is bolted to the rear side of the H-profiled steel bars 40. Further, above the H-profiled steel bars 40 is positioned the H-profiled steel bar 41, and the flange section 43 b on the other side of the corner pipe 43 and the H-profiled steel bar 41 are bolted to connect the H-profiled steel bars 40 and 41 to each other through the corner pipe 43. Then, the joint pipes 42 are bolted to the rear sides of the H-profiled steel bars 40 and 41, respectively.

After the pipes 42 and 43 are connected with the H-profiled steel bars 40 and 41, the segment piece 11A is inserted between the pipe 42 and the angle bar 44 from behind while fitting the recess 11 b in the lower segment piece 11A with the pipe 42 and the recess 11 d with the angle bar 44. Then, the recess 11 a in front of the segment piece 11A is fitted with the protrusion 40 c on the rear side of the H-profiled steel bar 40 (see FIG. 3).

Then, the segment piece 11B is inserted between the pipes 42 and 43 from behind while fitting the recess b in the upper segment piece 11B with the pipe 42 and the recess 42 c with the pipe 43. On this occasion, the recess 11 a in the front of the segment piece 11B is fitted with the protrusion 40 c on the rear side of the H-profiled steel bar 40. Further, the segment piece 21A is inserted between the corner pipe 43 and the joint pipe 42 in the ceiling section from behind while fitting the recess 21 b in the segment piece 21A with the corner pipe 43 and the recess 21 c with the joint pipe 42 in the ceiling section.

Similarly, the segment piece 21B is inserted between the pair of joint pipes 42 in the ceiling section from behind and the segment piece 21C is inserted between the joint pipe 42 in the ceiling section and the corner pipe 43 from behind. Then, the respective protrusions of the H-profiled steel bars 40 and 41 are fitted in the recesses 40 a and 41 a in the fitted segment pieces 11 and 21 from behind. As a result, all around the peripheries of the segment pieces 11 and 21 are surrounded by the H-profiled steel bars 40 and 41 and by the pipes 42 and 43, respectively.

Then, as shown in FIGS. 8 and 9, the pipes 42 and 43 are bolted to the rear sides of the H-profiled steel bars 40 and 41, and the segment pieces 11 and 21 are inserted between the pipes 42 and 43 from behind. Similar operations are repeated until the side wall 10 and the roof 20 reach necessary lengths in the direction to front and rear. With this procedure, the segment pieces 11 and 21 are sequentially assembled through the H-profiled steel bars 40 and 41 as well as the pipes 42 and 43 from the front side to the rear side of the house to form the side wall 10 and the roof 20.

When the side wall 10 and the roof 20 are assembled, a side wall 30 is attached to the front of the house. In this state, the protrusions 40 c and 41 c on the fronts of the H-profiled steel bars 40 and 41, respectively, are exposed. Accordingly, the side wall 30 is configured to fit opposing right and left inner sides of the protrusions 40 c and the lower face of the protrusion 41 c, and the frame of the side wall 30 is fixed to the H-profiled steel bars 40 and 41 as well as to the foundation through bolts or the like. Note that the frame of the side wall 30 may be made of foamed polystyrene. In this case, the side wall 30 is bonded and fixed to the respective front end faces of the segment pieces 11 and 21.

Then, a recess in the eaves 35 is fitted with the protrusions 40 c and 41 c of the H-profiled steel bars 40 and 41 on the front from before to cover the H-profiled steel bars 40 and 41 by the segment piece 36 and the segment pieces 11 and 21 on the front and then bond the segment piece 36 to the segment pieces 11 and 21. Similarly, the side wall 30 is attached to the rear side of the house. Finally, in order to improve fire resistance, fire retardance, weather resistance, water resistance, wound resistance, and sound insulation, there is coated on an outer surface of the house a coating material such as a resin concrete, which includes concrete and a polymer blended therein, thus completing the operation of assembly. Note that in order to increase bondability of the resin concrete, it is preferred that the house has a rough surface, and hence the surfaces of the segment pieces 11, 21, and 36 are formed uneven. In this case, the shape of the uneven portion is selected so as to be most suitable for improving the bondability between the resin concrete and the foamed polystyrene, such as, circle, tetragon, polygons such as pentagon or more and star polygons.

According to the first embodiment detailed above, the following advantages are obtained.

(1) Since the plurality of segment pieces 11 and 21 made of foamed polystyrene as a construction material are joined via the H-profiled steel bars 40 and 41 as well as via the pipes 42 and 43 to form a substantially rectangular parallelepiped knockdown house, the strength of the house in whole can be increased. As a result, the house can sufficiently endure pressures due to much deposited snow, falling objects and so on.

(2) The front and rear end faces of the segment pieces 11 and 21 are provided with recesses 11 a and 21 a, respectively, on end faces in the direction to front and rear. The recesses 11 a and 21 a define closed spaces in contact surfaces in the direction to front and rear between the segment pieces 11 and between the segment pieces 21, respectively. These closed spaces are configured to accommodate therein the H-profiled steel bars 40 and 41, respectively. With this construction, the peripheries of the H-profiled steel bars 40 and 41 are completely or substantially completely covered by the segment pieces 11 and 11 and by the segment pieces 21 and 21, respectively, so that the H-profiled steel bars 40 and 41 are thermally insulated by the segment pieces 11 and 21, respectively. As a result, thermal expansion and thermal contraction of the H-profiled steel bars 40 and 41 are inhibited, so that cracks on the surface of the house and peeling of a surface layer of the coating material or the like can be prevented. Further rust, corrosion, and dew formation of the H-profiled steel bars 40 and 41 can be prevented.

(3) The end faces of the segment piece 11 in the direction to top and bottom and the end faces of the segment piece 21 in the direction to right and left are each provided with the recess 11 b and the recess 21 c, respectively, by which closed spaces are defined in contact surfaces between the segment pieces 11 and between the segment pieces 21, respectively. These closed spaces are configured to accommodate the joint pipes 42. Further, the joint end faces of the segment piece 11B and segment piece 21A are provided with recesses 11 c and 21 c, respectively, by which closed spaces are defined in contact surfaces between the segment pieces 11B and between the segment pieces 21A, respectively. These closed spaces are configured to accommodate the corner pipes 43, respectively. With this construction, the joint pipes 42 and the corner pipes 43 are thermally insulated by the segment pieces 11 and 21, so that cracks on the surface of the house and peeling of surface layers such as the coating material as well as rust, corrosion, and dew formation of the H-profiled steel bars 40 and 41 can be prevented.

(4) Since the H-profiled steel bars 40 and 41 as well as the pipes 42 and 43 are accommodated in the recesses 11 a, 11 b, 11 c, 21 a, and 21 b, the surface of the house can be made smooth, thus providing an acceptable visual quality. The operation of applying the coating material on the surface of the house can be performed with ease.

(5) Since the ends of the segment pieces 11 and 21 are provided with recesses 11 a, 11 b, and 11 c and with recesses 21 a and 21 b, respectively, and the segment pieces 11 and 21 are fitted with the H-profiled steel bars 40 and 41, respectively, and with the pipes 42 and 43, respectively, to surround the segment pieces 11 and 21 in four directions, the strength of the house is increased and attachment of the segment pieces 11 and 21 becomes easier than ever, so that the assemblability of the house is increased. Therefore, the house can be assembled by laymen having no specialist knowledge or skill in architecture and related fields.

(6) Since the H-profiled steel bars 40 and 41 are bolted to pipes 42 and 43, the house in whole is covered by a framework assembled into a lattice-like structure to considerably increase the strength of the house.

(7) Since the joint sections of the segment pieces 11 and 21 are provided with the H-profiled steel bars 40 and 41 and with the pipes 42 and 43, respectively, reinforcing members as strength-bearing members can be constructed at low cost.

(8) Since the H-profiled steel bars 40 and 41 are provided as main reinforcing members on the plumb-bob vertical cross-section and the pipes 42 and 43 are provided as subsidiary reinforcing members to connect these H-profiled steel bars, the strength of the house can be efficiently increased by combinations of reinforcing members having different strengths.

(9) Since the ends of pipes are press-formed to form the flange sections 42 b, the fabrication of the joint pipes 42 can be facilitated.

(10) Since the pair of the pipes 43 a are joined through the joint bar 43 c to form a corner pipe 43, through which the H-profiled steel bars 40 are connected with the H-profiled steel bar 41, the strength of the house at the corners thereof can be easily increased.

(11) Since the segment pieces 11 and 21 are added in the direction to front and rear until a necessary length is reached to form the rectangular parallelepiped house 100, the length of the house in the direction to front and rear can be easily varied.

(12) Since the H-profiled steel bars 40 and 41 as well as the pipes 42 and 43 are provided in joint sections of the segment pieces 11 and 21, sufficient strength of the house can be secured even when the thicknesses of the segment pieces 11 and 21, respectively, are reduced. Further, use of the segment pieces 11 and 21 with lower profiles increases transportability thereof and assemblability of the house therewith to decrease the cost.

(13) Since the segment pieces 11 and 21 are made of foamed polystyrene as a construction material, segment pieces 11 and 21 with various shapes can be easily formed and the segment pieces 11 and 21 can be mass-produced with ease by using a mold for shaping.

Note that the side wall 30 in the front of the house can be formed by combining a plurality of segment pieces made of foamed polystyrene as a construction material. On example of such is shown in FIG. 10. In FIG. 10, the side wall 30 is constituted by a segment piece 32 in the form of a curved surface. In a recess 32 a in the upper end of the segment piece 32, there extends the corner pipe 43 curved according to the shape of the side wall 30 in the direction to right and left. The left and right ends of the corner pipe 43 are bolted to the H-profiled steel bars 40 and 41, respectively. In this case, the hole 32 a for inserting a bolt therein is provided so as to open on an outer surface of the segment piece 32. After the segment pieces 32 are fitted with the H-profiled steel bars 40 and 41, bolts are inserted through the holes 32 a to bolt the corner pipe 43 to the H-profiled steel bars 40 and 41. Installing the corner pipe 43 on the front of the house in the direction to right and left further increases the strength of the house. Not only the corner pipes 43 but also joint pipes 42 may be provided so as to extend to the front of the house. Note that the side wall 30 may be made of foamed polystyrene alone and bonded to the front of the house. Further, the side wall 30 may be provided with a window or a door.

Second Embodiment

Referring to FIGS. 11 to 15, explanation is made on a resin knockdown house according to the second embodiment of the present invention.

FIG. 11 is an overall perspective view showing the resin knockdown house according to the second embodiment of the present invention. FIG. 12 is an exploded perspective view of FIG. 11. In the first embodiment, the house 100 having an inner space in a substantially rectangular parallelepiped form defined by the side walls 10 and the roof 20. In contrast, in the second embodiment, a dome-like house 200 having an inner space in a substantially semispherical form is formed. Hereinafter, explanation is focused on differences from the first embodiment.

The dome-like house 200 includes a plurality of dome-like segment pieces 51A to 51D (in some cases in the following description, generically represented by 51) made of foamed polystyrene as a construction material, which are assembled in the circumferential direction and in the height direction. On the peripheral surface of the dome-like house 200 are provided with windows 52 and a door 53, and on the top thereof is provided with a top light (roof light window) 48 for natural lighting and ventilation. The dome-like house 200 is self-sustained only by bonding of the plurality of segment pieces 51. In the present embodiment, however, H-profiled steel bars 46 as main reinforcing members and joint pipes 47 as subsidiary reinforcing members are assembled at respective joint sections of the segment pieces 51 in order to increase the strength of the house in a similar manner to the first embodiment. Note that the joint pipes 47 are formed similarly to the joint pipes 42 in the first embodiment.

The H-profiled steel bars 46 are set up in the meridional direction from the top to the base of the house. The upper end of each of the H-profiled steel bars 46 is fitted in a recess 48 a in the peripheral surface of the top light 48 and the lower ends of the H-profiled steel bars 46 are bolted to angle bars 49 arranged circumferentially on the foundation of the house. On sides of the segment piece 51 in the circumferential direction are provided with recesses 51 a having a similar form to those of the recesses 11 a shown in FIGS. 3 and 4 and in the recesses 51 a, there are accommodated the H-profiled steel bars 46. The contact surfaces of the opposing segment pieces 51 in the circumferential direction are bonded to each other with an adhesive. With this construction, the H-profiled steel bars 46 are accommodated in closed spaces defined by the recesses 51 a in the contact surfaces of the segment pieces 51 and the respective peripheries of the H-profiled steel bars 46 are completely covered by a pair of adjacent segment pieces 51.

Note that not all the peripheral joint surfaces of the segment pieces 51 are fitted with the H-profiled steel bars 46. For example, the window section 52 and the door section 53, the H-profiled steel bars 46 are omitted. In this case, as shown in FIG. 12, the end faces of the segment pieces 51 and 51 in the window section 52 are provided with a recess 51 c and a projection 51 d, respectively, through which the segment pieces are engaged with and bonded to each other. To the window section 52, there is attached a window frame 52 a.

Similarly to the construction shown in FIG. 8, flange sections of the joint pipes 47 are perpendicularly bolted to the H-profiled steel bars 46. Top and bottom end faces of the segment pieces 51 are provided with recesses 51 b of a similar form to that of the recess 11 b shown in FIG. 7. In the recesses 51 b are accommodated the joint pipes 47, respectively, and the top and bottom contact surfaces of the opposing segment pieces 51 are bonded with an adhesive. With this construction, the pipes 47 are accommodated in closed spaces defined by the recesses 51 b in the joint end faces of the segment pieces 51, so that the peripheries of the joint pipes 47 are completely covered by the segment pieces 51. That is, the segment pieces 51 are surrounded by the H-profiled steel bars 46 and the joint pipes 47 in four directions.

Next, explanation is made on the procedure of assembling the resin knockdown house according to the second embodiment. First, as shown in FIG. 13, the angle bar 49 is laid down on the foundation of the house along the entire perimeter thereof, H-profiled steel bars 461 to 464 are set up between the angle bar 49 and the top light 48 at an interval of, for example, 90 degrees, and the top and bottom ends of the angles bars are bolted. This state is shown in the schematic plan view in FIG. 14( a). Then, on one side in the circumferential direction of each H-profiled steel bar 46, there is provided with a plurality of joint pipes 47 at a predetermined interval in the direction of the height of the dome. Each of the plurality of the pipes 47 is perpendicularly bolted to the H-profiled steel bar 46. Then, a segment piece 511 is inserted between two adjacent joint pipes 47 from one side of the H-profiled steel bar 461 in the circumferential direction while fitting the joint pipes 47 in the recesses 51 b of the segment piece 511. As shown in FIG. 14( b), the recesses 51 a of the segment piece 511 are fitted with the protrusions of the H-profiled steel bar 461 and the opposing end faces are bonded to each other. Similarly, between the joint pipe 47 and the angle bar 49, there is inserted the segment piece 511 from one side of the H-profiled steel bar 461 in the circumferential direction and the opposing end faces thereof are bonded to each other.

Then, as shown in FIG. 14( c), the protrusions of an H-profiled steel bar 465 are fitted in the recesses 51 a of the segment piece 511 from one side in the circumferential direction and the base of the H-profiled steel bar 465 is bolted to the angle bar 49 and also similarly to the construction shown in FIG. 8, a plurality of the joint pipes 47 is bolted to the H-profiled steel bar 465 at a predetermined interval in the direction to top and bottom. Then, between the joint pipes 47 and between the joint pipe 47 and the angle bar 49, there are inserted respective segment pieces 512 from one side in the circumferential direction and the recesses 51 a of the segment pieces 512 are fitted with the protrusions of the H-profiled steel bar 465. On this occasion, if the H-profiled steel bar 462 would disturb the operation upon attachment of the segment piece 512, the H-profiled steel bar 462 may be temporarily detached as shown in FIG. 14( d). Then, as shown in FIG. 14( e), an H-profiled steel bar 466 is attached. After all the segment pieces 513 are attached as shown in FIG. 14( f), the H-profiled steel bar 462 is attached again.

As mentioned above, the H-profiled steel bar 46 and the segment piece 51 are alternately attached, for example, in the clockwise direction to form the dome-like house 200. In this case, assuming that the segment piece 51 to be attached last is the door section 53, the door section 53 is attached as follows. First as shown in FIG. 15( a), between the H-profiled steel bars 46 and 46, there is inserted the segment piece 51D from below, and in a state in which the upper end of the segment piece 51D is fitted with the top light 48 and the recesses 51 a on the side ends of the segment piece 51D are fitted with the H-profiled steel bars 46, respectively, the segment piece 51D is bonded and fixed.

Then, as shown in FIG. 15( b), the joint pipe 47 is bolted to the lower end of the segment piece 51D to constrain the position of the segment piece 51D. Further, as shown in FIG. 15( c), the segment piece 51C is inserted between the H-profiled steel bars 46 and 46 from below, and in a state in which the recess 51 b of the upper end of the segment piece SIC is fitted with the joint pipe 47 and the recess 51 b on the side end of the segment pieces 51C is fitted with the H-profiled steel bars 46, the segment piece 51 c is bonded and fixed. Thereafter, while fitting the joint pipe 47 in the recess 51 b on the lower end of the segment piece 51C, both the ends of the joint pipe 47 are bolted to the H-profiled steel bars 46. Then, inside the H-profiled steel bars 46, there are sequentially attached pieces 531 to 534 of the door section 53, which then are bonded and fixed.

As mentioned above, in the second embodiment, the plurality of the segment pieces 51 and 51 made of foamed polystyrene as a construction material are connected through the H-profiled steel bars 46 and the joint pipes 47 to form the dome-like house 200. The closed space in the joint surface defined between the recesses 51 a and 51 b is adapted to accommodate the H-profiled steel bars 46 and the joint pipes 47. With this construction, the peripheries of the H-profiled steel bars 46 and the joint pipes 47 are completely or substantially completely covered by the segment pieces 51, so that cracks on the surface of the house and peeling of the coating material and the like can be prevented. Further rust, corrosion, and dew formation of the H-profiled steel bars 40 and 41 can be prevented. Since the ends of the segment pieces 51 are fitted with the H-profiled steel bars 46 and the joint pipes 47 to surround the segment pieces 51 in four directions, the strength of the house is increased. Since the segment pieces 51 are inserted in spaces defined by the H-profiled steel bars 46 and the joint pipes 47, attachment of the segment pieces 51 is easy to improve assemblability of the house.

—Modification 1—

In the house 100 or 200, there may be provided partition walls to divide the inside space therewith. With this construction, a plurality of houses with different intended end-usage can be formed. Further, two floors may be formed in the house to build a two-story structure. FIGS. 16( a) and (b) are a plan view and an elevational view, respectively, showing an example of the dome-like house 200 which has a two-story structure therein. In the figures, a floor face 201 of a first story section of the house is made lower than a floor face 204 near the entrance section 5. On the floor face 201, there is set up a plurality of posts 203 and a floor face 202 of a second story is formed on the upper parts of the posts. A spiral staircase 205 is provided from the floor face 204 to the floor face 202 and a staircase 206 is provided from the floor face 204 to the floor face 201. Note that since the dome-like house 200 has a larger height of the ceiling section toward the center, bookcases and closets may be placed on positions on the second story section where the ceiling is relatively high and beds and sofas may be placed on the second story section where the ceiling is relatively low. With this construction, the second story section can be efficiently used.

—Modification 2—

A plurality of knockdown houses 100 and 200 may be joined with living spaces inside thereof being communicated with each other. FIGS. 17( a) and (b) show an example of such is shown in a plan view and an elevational view, respectively. FIG. 17 shows a construction in which a rectangular parallelepiped house 101 is arranged between dome-like houses 201 and 202 and a rectangular parallelepiped house 102 is arranged between dome-Like houses 202 and 203. These houses are communicated with each other. In this case, the rectangular parallelepiped houses 101 and 102 serve as corridors communicating the dome-like houses 201 to 203. Further, the dome-like houses 202 and 203 are joined with rectangular parallelepiped houses 103 and 104, respectively, and the rectangular parallelepiped houses 103 and 104 are each provided with the entrance section 31. By joining the plurality of houses 100 and 200 with each other and communicating the internal spaces with each other, a scalable knockdown house having various types of rooms can be formed with ease. It is possible to scale up the house to any desired extent and a wide variety of houses can be formed.

FIG. 18 shows the construction of the joint section of the rectangular parallelepiped house 100 and the dome-like house 200. In FIG. 18, a frame 210 having a shape that corresponds to the shape of an end of the rectangular parallelepiped house 100 is attached to the surface of the dome-like house 200. The frame 210 may be made of wood, aluminum, foamed polystyrene, or the like. When the frame 210 is a wood frame or an aluminum frame, the frame 210 is attached to the surface of the dome-like house 200 with screws whereas when a foamed polystyrene frame is used, it is attached to the surface of the dome-like house 200 by bonding. Note that the segment piece 51 and the frame 210 may be cast. With the frame 210 is fitted an end 110 of the rectangular parallelepiped house 100 and the end 110 is fixed to the frame 210 with screws from outside of the rectangular parallelepiped house 100 to connect the houses with each other.

Note that the arrangement of individual knockdown houses is not limited to that shown in FIG. 17. For example, a knockdown building such as a storage or warehouse may be installed, to which the rectangular parallelepiped house 100 or the dome-like house 200 may be joined. In this case, the storage and warehouse are places where people go in and out, so that the internal spaces thereof are included in the living space of the knockdown house according to the present invention.

—Other Modifications—

In the above-mentioned embodiment, H-profiled steel bars 40, 41, and 46 and pipes 42, 43, and 47 as strength-bearing members are accommodated in joint surfaces of the segments 11, 21, and 51. However, reinforcing members other than H-profiled steel bars and pipes may be used as far as they can be accommodated in closed spaces defined in the joint surfaces and join the segment pieces to each other. Therefore, the shapes of the recesses provided in the joint surfaces of the segment pieces 11, 21, and 51 are not limited to those mentioned above.

Note that the dome-like house 200 has been explained above to be of a semispherical, it is not limited to a semisphere (circle in a plan view), but also a polygon in a plan view. Further, the term “semispherical” as used herein refers to figures or graphic forms that are neither “circle” nor “polygon” in a geometrically strict sense, such as a polygon with its sides being rounded to some extent or otherwise modified.

The shape of the house is not limited to rectangular parallelepiped or dome-like. For example, as shown in FIG. 19, the house may be a substantially semicylindrical, so-called hog-backed house 600 having an arcuate surface in the direction to right and left, and extends in the direction to front and rear. The house 600 shown in FIG. 19 may be provided with the entrance section 31, the window section 12, the top light 48 and so on. In this case, the H-profiled steel bars as reinforcing members may be provided in the joint surface of the segment pieces 61 in the direction to front and rear as divided in multiple pieces in the circumferential direction. The divided H-profiled steel bars may be provided at intervals instead of providing along the entire periphery in the circumferential direction. This makes transportation and execution easier.

Further, on the joint surfaces of the segment pieces 61 in the circumferential direction, there may be provided a reinforcing member 62 having a substantially Z-shaped cross-section as shown in FIG. 20 instead of the pipes 42 and 43. In this case, a part of the reinforcing member 62 may be exposed on the surface of the segment piece 61 as shown in FIG. 20( c), or the reinforcing member 62 may be completely covered by the segment piece 61 as shown in FIG. 20( c). By providing the reinforcing member 62 having a substantially Z-shaped cross-section, invasion of rain water into the inside along the joint surfaces can be prevented. The invasion of rain water may be prevented by providing the house 100 shown in FIG. 1 and the house 200 shown in FIG. 11 with the reinforcing members 62, respectively.

By using the segment piece 61 shown in FIG. 20, a substantially cylindrical peripheral wall 65 may be formed. For example, four central segment pieces 61 a may be assembled and set up to form a peripheral wall 65 as shown in FIG. 21( a). Further, by stacking the resultant peripheral wall 65 in the direction to top and bottom, a substantially cylindrical house may be built as shown in FIG. 21( b). Note that in FIG. 21( b), the roof is shown as being dome-like but the roof does not have to be dome-like.

In the dome-like house 200 shown in FIG. 11, the segment pieces 51A to 51D divided in the meridional direction from the top to the base are assembled. However, the segment piece 51D near the top is small in size, a larger segment piece may be used near the top. One example of such is shown in FIG. 22. In FIG. 22, a pair of segment pieces 71 is used.

FIG. 23 is a longitudinal cross-sectional view of the dome-like house 200 shown in FIG. 22. On an end face of a segment piece 71 is provided with a recess 71 a and an end of a segment piece 71 opposing the recess 71 a is provided a protrusion (not shown). The protrusion is fitted in the recess 71 a to join the segment pieces 71 with each other in the circumferential direction. On the other hand, on each end of a segment piece 72 is provided with a recess 72 a, in which a plate (not shown) as a reinforcing member is inserted to join the segment pieces 72 with each other through the plates in the circumferential direction. Between the segment pieces 71 and the segment pieces 72, there are provided joint members 73.

FIG. 24 is an enlarged perspective view showing a joint member 73, and FIG. 25 is a diagram illustrating the state of attachment of the joint member 73. The joint member 73 includes a pair of plates 73 a and 73 b and a plate 73 that is obliquely joined therebetween. That is, the joint member 73 has a substantially H-shaped cross-section and is provided with a pair of recesses 73 d and 73 e as shown in FIG. 25( a). In the recesses 73 d and 73 e, there are fitted a lower end of the segment piece 71 and an upper end of the segment piece 72, respectively, and the segment pieces 71 and 72 are joined through the joint members 73. This construction increases the strength of joint between the segment pieces 71 and 72. Further, since the position of the segment piece 71 is constrained with respect to the segment piece 72 due to the joint member 73, the segment pieces 71 and 72 can be fixed until the adhesive is set, so that the house 200 can be easily assembled.

Note that in FIG. 22, between the segment piece 71 and the segment piece 72, there is locally provided only one joint member 72 but two or more joint members 73 may be provided. As shown in FIG. 22 in a dotted line, it would also be acceptable to provide a joint member 730 on upper corner sections of the segment pieces 72 to join the segment pieces 72, 72, and 73 through the joint member 730. On the joint section of the segment pieces 11A and 11B in FIG. 1 and the joint section of the segments 51A to 51D in FIG. 11, that is, the joint sites of the segment pieces in the direction to top and bottom, there may be provided joint members 73 instead of the pipes 42 and 47 at intervals.

Coating may be performed in advance in the stages of the segment pieces 11, 21, and 51 instead of coating the resin concrete after the assembly of the house. With this, one step of operation on site can be eliminated, so that the efficiency of operation is increased. A plurality of segment pieces made of a resinous material such as a reinforced plastic (FRP) as a construction material instead of foamed polystyrene may be assembled to form a knockdown house having inside living spaces such as shop spaces and various types of commercial spaces. In this case too, a layer of resin concrete or the like is provided on the surface thereof. Since FRP is inferior in sound insulating properties and heat insulating properties to the foamed polystyrene, it is preferred to spray foamed polystyrene on the inner surface and resin concrete on the resultant surface. A plurality of layers of resin concrete or the like may be provided on the surface of the house. In this case, when a layer of a weather resistant material is provided on the outermost surface of the house, its durability is increased.

The pipes (subsidiary reinforcing member) 42, 43, and 47 may be bolted substantially perpendicularly to the horizontal direction to the H-profiled steel bars (main reinforcing members) 40, 41, and 46 extending in the plumb-bob vertical cross-section in the direction to top and bottom and in the direction to right and left to form a lattice like framework of the house in whole. However, the shape of the framework is not limited thereto. In the above, although the pipes 42, 43, and 47 having a round cross-section are used as a hollow member, pipes having a square cross-section may be used as the hollow member.

The present invention may be applied to knockdown houses having spaces of various forms, such as temporary housing, simple frame houses, vacation houses, ordinary houses and so on. That is, as far as the features and functions of the present invention are realized, the present invention is not limited to the resin knockdown house according to the above-mentioned embodiment. 

1. A foamed resin knockdown house comprising: a plurality of segment pieces made of a foamed resin provided with a recess on each end face, wherein a pair of opposing recesses in any two adjacent segment pieces out of the plurality of segment pieces defines a closed space; and a plurality of reinforcing members each adapted to be accommodated in the closed space to join the adjacent segment pieces to each other, whereby the foamed resin knockdown house is adapted to be assembled to define a space inside thereof.
 2. A foamed resin knockdown house according to claim 1, wherein: the segment pieces are each in the form of a tetragon, each side of the tetragon being provided with the recess to accommodate the reinforcing member.
 3. A foamed resin knockdown house according to claim 1, wherein: the reinforcing member includes: a plurality of main reinforcing members extending in a vertical cross-section; and a plurality of subsidiary reinforcing members extending in a direction substantially vertical to the main reinforcing members, wherein the plurality of main reinforcing members are connected with each other through the subsidiary reinforcing members.
 4. A foamed resin knockdown house according to claim 3, wherein: the main reinforcing members include each an H-profiled steel bar.
 5. A foamed resin knockdown house according to claim 3, wherein: the subsidiary reinforcing members include each a pipe.
 6. A foamed resin knockdown house according to claim 3, wherein: the subsidiary reinforcing members have each a substantially Z-shaped cross-section.
 7. A foamed resin knockdown house according to claim 1, further comprising: a joint member having an H-shaped cross-section adapted to be fitted with an upper joint surface and a lower joint surface of the segment pieces to join the upper and lower segment pieces.
 8. A foamed resin knockdown house according to claim 1, wherein: the segment pieces are adapted to define the inner space in the house to have a substantially rectangular parallelepiped form.
 9. A foamed resin knockdown house according to claim 1, wherein: the segment pieces are adapted to define the inner space in the house to have a substantially semispherical form.
 10. A foamed resin knockdown house comprising: a plurality of houses selected from the resin knockdown houses according to claim 1, wherein the resin knockdown house system has therein spaces of the selected houses communicated with each other.
 11. A foamed resin knockdown house according to claim 1, wherein: the segment pieces made of the resin includes foamed polystyrene as a construction material.
 12. A foamed resin knockdown house comprising a plurality of segment pieces made of a foamed resin adapted to be assembled and bonded together to form a space enclosed thereby, wherein the knockdown house includes a plurality of structural units, each structural unit including; a group of segment pieces, among the plurality of segment pieces, each having first ends along a first direction and seconds ends bridged by the first ends along a second direction, the first ends each being provided with a first recess extending along each first end and the second ends each being provided with a second recess extending along each second end, wherein any two adjacent segment pieces of the group of segment pieces whose first ends face to each other, when assembled and bonded to each other, define a first closed space by the first recesses; a first reinforcing member adapted to be accommodated in each of the first closed spaces defined by any two adjacent segment pieces of the group of segment pieces; a second reinforcing member adapted to be accommodated in each of the second recesses along each second end of the segment pieces of the group of segment pieces; and a joint member adapted to join at least one first reinforcing member with at least one second reinforcing member, wherein the plurality of the structural units, when joined with and bonded to each other, provide a house having a space inside thereof.
 13. A foamed resin knockdown house according to claim 12, wherein: the first reinforcing member includes a joint section at an end thereof through which the first reinforcing member is joined with the second reinforcing member in a state in which the first reinforcing member is accommodated in the first closed space.
 14. A foamed resin knockdown house according to claim 12, wherein among the plurality of structural units, at least one pair of structural units that are joined with each other along the second ends thereof defines a second closed space by the second recesses when assembled and bonded to each other, in which closed space the second reinforcing member is accommodated.
 15. A foamed resin knockdown house according to claim 14, wherein the second reinforcing member is a main reinforcing member that extends in a surface of the bonded segment pieces and the first reinforcing member is a subsidiary reinforcing member extending in the surface in a direction substantially perpendicular to the main reinforcing member, and the structural units include a first structural unit provided in a first surface and a second structural unit provided in a second surface crossing the first surface, and the first and second structural units in the first and second surfaces, respectively, are each joined with each other at opposing ends thereof through the main reinforcing members or the subsidiary reinforcing members and bonded to each other to form a joint section in which the reinforcing members of each structural unit are joined with each other.
 16. A foamed resin knockdown house according to claim 15, wherein the segment pieces are configured such that when assembled to provide a house, an inner space of the resulting house is substantially rectangular parallelepiped, the first surface is a surface of a peripheral wall of the knockdown house, and the second surface is a surface of a roof of the knockdown house.
 17. A foamed resin knockdown house according to claim 14, wherein the segment pieces are configured such that when assembled to provide a house, an inner space of the resulting house is substantially semispherical, and the structural unit constitutes a part of a substantially spherical surface, and opposing ends of adjacent structural units are bonded to and connected with each other through the first reinforcing member or the second reinforcing member.
 18. A foamed resin knockdown house according to claim 17, wherein the segment piece includes a segment piece for a door constituting an entrance section of the house, the segment piece for a door including a plurality of subunits that when assembled define an opening for the door, and the segment piece for a door is free of the reinforcing member.
 19. A foamed resin knockdown house according to claim 1, further comprising: a plurality of posts set up inside the house separate from the structural unit, wherein the plurality of posts supports a flooring above an entrance section of the house, and the flooring divides the space into an upper part and a lower part.
 20. A foamed resin knockdown house according to claim 12, further comprising: a plurality of posts set up inside the house separate from the structural unit, wherein the plurality of posts supports a flooring above an entrance section of the house, and the flooring divides the space into an upper part and a lower part.
 21. A method of assembling a plurality of pieces of a dome made of a foamed resin to build a house, the method comprising: providing a plurality of reinforcing members extending along meridian circles of the dome to define a plurality of wall-forming spaces between any two adjacent reinforcing members; sequentially installing in each of the plurality of wall-forming spaces at least two pieces of a dome, including an upper section and a lower section; when a last wall-forming space is closed, providing a door member including at least two parts divided in the direction to right and left each having an outer end face and an inner end face, and fixing the outer end faces of the at least two parts to opposing reinforcing members to form a doorway space in an open space defined between the door members; and providing a door in the doorway space. 